Thiophanate Ethyl-d10 is the isotope labelled analog of Thiophanate Ethyl; a systemic fungicide used in plant protection. Thiophanate Ethyl was shown to be effective against Botryotinia [ Sclerotinia] fuckeliana and Uncinula necator on grapevines, Mycosphaerella fragariae on strawberries, and powdery mildew of cucumber.